Electric rivet heater



Apr. 24,1923.

w. s. JOHNSON ET Al.

ELECTRIC RIVET HEATER Filed March 21. 1921 moam Patented Apr. 24, 1923.

PATENT OFFICE;

WILLIAM S. JOHNSON AND JOHN W. SHEFFER, F BERWICK, PENNSYLVANIA JASSIGNORS TO AMERICAN CAR AND FOUNDRY COMPANY, OF s MISSOURI, ACORPORATION. OF NEW JERSEY.

'r. LOUIS,

ELECTRIC RIV ET HEATER.

Application filed March 21, 1921. Serial No. 454,036.

To all whom it may concern:

Be it known that we, WILLIAM S. JOHN- SON and JOHN W. SIIEFFER, residingat Berwick, in the county of Columbia and State of Pennsylvania, andbeing citizens of the United States, have invented certain new anduseful Improvements in an Electric Rivet Heater, of which the followingis a full, clear, and exact description, such as Will enable othersskilled in the art to which it apperta'ins to make and to use the same,reference being had to the accompanying drawings, which illustrate thepreferred form of the invention, though it is to be understood that theinvention is not limited to the exact details of construction shown anddescribed, as it is obvious that various modifications thereof Withinthe scope of the claims will occur to persons skilled in the art.

In said drawings:

The figure is a perspective view showing our improved electric rivetheater, the protecting hood being shown partly open, and part of thesupporting frame being shown in dotted lines.

It is the object of our invention to pro vide an improved electric rivetheater that is equipped with a protecting hood so that the heater may beused where exposed to the elements without risk of the coil insulationbeing damaged.

In the drawings, the primary coils l, secondary coils 2 and separators 3are supported upon a laminated core confined be tween the angle barmembers 17 that are held against the core by the bolts 18, the bolts 18serving also to secure the hoisting loops 19v and the U-shaped angle barsupporting member 20 to the member 17. The lower bolt 18 also securesthe members 17, 19 and 20 to the core retaining members 7 which aresupported on and connected to the side members 4: and 5. .Joining themembers 4: and 5 is the connecting member 6 which also serves as a guideand a stop for the electrode operating levers21. Adjustably supportedfrom the U-shaped mem- 'coil adapted to receive a rivet ber 20 by thebolts 22 are the upper elec trodes or terminals of the secondary coil 2.

To protect the heater from the elements when used in an exposedposition, a hood. is provided comprising sides 8 and 9 of substantiallycircular shape. The sides have their edges bent inwardly, as at 10, andsecured to the sides, close to the edges, are rollers 11, the rollers 11and the bent portlons of the sides retaining the sliding cover sectlons12 in position. There are three of these cover sections and they perm1tof the hood being opened sufiiciently to permlt of rivets being heatedor to a greater extent so that the hoisting loops 19 can be used withoutnecessitating the removal of the hood from the heater. The sections areprovlded with handles 13 for convenience of operation.

The sides 8 and 9 are joined by the rods let and nuts 15 which serve tokeep the sides together so as to retain the cover sections 1n place.Screws-16 engaging the sides 8 and 9 and the core retaining members 17at the ends of the core serve to secure the hood to the heater frame.

What We claim is:

1. In an electric rivet heater, :1 frame, coils carried by said frameand a sectional sliding hood for said coils secured to said frame.

2. In an electric rivet heater, a frame, coils carried by said frame andadjustablv opening covering means for said coils. I

8. In an electric rivet heater, a secondary v for heating and coveringmeans for said coil adapted to open to permit insertion of the rivet.

4. In an electric rivet heater, a frame, a secondary coil carried bysaid frame, hoisting loops secured to said frame and a cover for saidcoil adapted to open to permit the use of said chain hooks.

5. In an electric rivet heater, 3, frame, coils carried by said frame,flanged members secured to said frame and sliding cover sections forsaid coils carried by said members.

6. In an electric rivet heater, a frame,

coils carried by said frame, hoisting loops In Witness whereof We havehereunto set secured to said frame, flanged members seour hands in thepresence of two witnesses. cured to said frame and sliding cover sec-WILLIAM S. JOHNSON. tions for said coils carried by said members, JOHNW. SHEFFER.

' said cover sections being adapted to be Witnesses:

positioned to permit use of said hoisting H. F. TRAUGH, loops. FRED A.HOFFMAN.

